How the range is built
The model uses dated local planning bands for kitchens, bathrooms, whole-home renovation, basement finishing, standardized wood and composite decks and finished additions. Square footage is used only for whole-home and addition scopes.
What the range leaves out
Final drawings, selection schedules, engineering, permit requirements, hidden conditions, unusual site work, escalation after July 2026 and a contractor’s current trade pricing can move the number.
Challenging access is shown as a separate planning note. The tool does not hide an automatic percentage inside the main range.
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